Method and apparatus for automatic re-attachment of thread in sp

Details Method and apparatus for automatic re-attachment of thread in sp Method and apparatus for automatic re-attachment of thread in sp

1974-08-05

1976-04-20

Watkins, Donald E.

Textiles: spinning, twisting, and twining

Apparatus and processes

Web material

57 81, 57156, D01H 1316, D01H 1314

Patent

active

039509257

ABSTRACT:
In spinning machines, a thread is spun from a roving emerging from a draw frame. When a thread breakage occurs, the roving continues to emerge but its path is deviated by air currents.
The presence of the roving on the deviated path is detected and a thread re-attachment process is initiated.
An apparatus for practicing the above method includes a light source and light detector for determining the presence of the roving in the appropriate location. An alternative embodiment of the invention provides a mechanical device, e.g. a foraminous gate, to respond to the presence of unspun roving in a suction bypass channel of the spinning machine. In both cases, an actuating signal is produced for initiating the thread re-attachment process.

REFERENCES:
patent: 2956392 (1960-10-01), Ohnishi
patent: 3158852 (1964-11-01), Schacher
patent: 3309859 (1967-03-01), Vehorn
patent: 3498039 (1970-03-01), Kent et al.
patent: 3659409 (1972-05-01), Saunders
patent: 3754718 (1973-08-01), Abbott

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